Paid, agent-first HTTP APIs for compliance facts. No accounts, no API keys — agents pay per request via x402 (USDC, settled at the edge). Every API is a thin adapter over an offline, fail-closed fact engine. From the maker of the chrisked.de blog.
| API | What it answers | Status |
|---|---|---|
| iban | SEPA-wide IBAN validation (bank, BIC, LEI, reachability) and fail-closed German BLZ/Konto → IBAN calculation against the complete Bundesbank rulebook — the correct IBAN or a refusal, never a guess. | launching |
| lei | LEI lookup, search, entity matching, and corporate trees (GLEIF). | scaffolded |
| vat | EU VAT number validation with consultation numbers (VIES). | scaffolded |
| letter | DIN 5008 government letters as archival PDF/A-2b, rendered from structured input. | scaffolded |
Each API serves its machine-readable contract at
/openapi.json and a free demo lane on its playground.